forked from Mirror/wren
26 lines
634 B
Plaintext
26 lines
634 B
Plaintext
class TestSequence is Sequence {
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construct new() {}
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iterate(iterator) {
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if (iterator == null) return 1
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if (iterator == 3) return false
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return iterator + 1
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}
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iteratorValue(iterator) { iterator }
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}
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var test = TestSequence.new().take(3)
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System.print(test is Sequence) // expect: true
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System.print(test) // expect: instance of TakeSequence
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// Taking 0 produces empty list.
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System.print(test.take(0).isEmpty) // expect: true
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// Taking 1 works.
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System.print(test.take(1).toList) // expect: [1]
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// Taking more than length of sequence produces whole sequence.
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System.print(test.take(4).toList) // expect: [1, 2, 3]
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